[FEATURE REQUEST] Option to hide entity icon (prob. using toggle?)

[david-rapan]

Describe the solution you'd like
Option to hide entity icon and thus display only the value in the middle of the circle.

Describe alternatives you've considered
Empty value in the icon configuration item and it does hide the icon but leaves empty space and thus the entity value is not in the middle of the circle.

Additional context

[flixlix]

added this functionality in #591

Decided not to implement a new toggle to all fields, instead, simply insert a space in the icon field to hide the icon.

Will be available in 0.2.2